Which digit has the highest value in 27‚541? 3. What is the place value of 3 in 23‚450? 4. How many hundreds are there in 5‚330? 5. How many tens are there in 29‚920? 6. What is the biggest 2-digit even number? 7. What is the odd number next to 395? 8. What comes after 346? 9. Arrange from least to greatest. {32‚ 47‚ 23‚ 73‚ 53} 10. What is the correct symbol to be used in 89 (‚ =) 45? 11. In the expression 5-3=2. What do you call 2? 12. Write on-half in symbols. 13. I am a two digit number
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smallest number should be added to 4456 so that the sum is completely divisible by 6 ? Q. 18 How many 3 digit numbers are divisible by 6 in all ? Q. 19 Find the units digit for 7^197 without using a calculator. Q. 20 What is the units digit of (2)3(3)3(4)3(5)7(6)2(7)2 Q. 21 What is the units digit of 13^35 ? Q. 22 Find the units digit of 57^30 Q. 23 Find the units digit of 34^33 Q. 24 Is 52563744 divisible by 24 ? Q. 25 If a - b = 3 and a2 + b2 = 29‚ find the value of ab
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The Left Digit Effect in Pricing Strategy: $19.99 Because $20 is Too Much! Have you ever come across price tags that have 9 endings? Have you ever bought those merchandise with 9 endings thinking that was the best deal and ended up with an enormous bill? Do you notice that the 9 endings are usually printed in a much smaller size than the digits on the left? This is a result of a psychological concept called “The Left Digit Effect” in which people tend to pay more attention to the left-most digits
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Significant Figures in Measurement and Calculations A successful chemistry student habitually labels all numbers‚ because the unit is important. Also of great importance is the number itself. Any number used in a calculation should contain only figures that are considered reliable; otherwise‚ time and effort are wasted. Figures that are considered reliable are called significant figures . Chemical calculations involve numbers representing actual measurements. In a measurement‚ significant figures
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Notes on significant figures When we use an equipment to take measurement‚ it is important to be honest when reporting a measurement‚ so that it does not appear to be more accurate than the equipment used to make the measurement allows. To achieve this‚ we can control the number of significant figures used to report the measurement. When we look at a number‚ its first significant figure is the first digit from the left‚ other than 0. E.g. - in the number 539 the first significant figure
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Significant Figure Rules Significant figure rules are really "rules of thumb" for how to handle the results of calculations so as not to introduce or lose precision in performing a mathematical operation. These rules are not always correct for all situations. However‚ in most cases‚ following the significant figure rules will yield a good result. Rules concerning zero A zero between two significant figures is significant. The number 203.2 consists of four significant figures. A Zero
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will be caught. A. SIGNIFICANT FIGURES (10 pts.) (Show the actual results first before rounding off the digits into their proper significant figures.) A.1. Determine the number of significant figures in each numerical value below. (Assume all values are measurements.) 1. 357 ml 2. 1.0600 L 3. 0.000 501 g 4. 23‚ 000 tons 5. 1.8000 X 105 mi A.2. Perform the following arithmetic operations and express the answer to the correct number of significant figures 1. 0.392
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which glassware (beakers‚ burettes‚ pipettes‚ graduated cylinders‚ flasks‚ etc) should be used in various circumstances. 2. Know how to “correctly” measure volume and mass (weight). 3. Become familiar with significant figures and its relationship to measurements and data recording (significant figures). 4. Become familiar with the errors‚ precision and accuracy associated the various measurement tools and techniques. 5. Determine the density of liquids and solids. 6. Determine the best-fit straight
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don’t need no introduction! Team >> Publisher What do you have to say? www.think Note: Your opinion could earn you the next 3 Issues Free .com/feedback ■ editorial Re-evolution! 1100100~1101001~1100111~1101001~1110100 “Digit is another step on the path of evolution that we have embarked upon” nother day…another bit of news. Some things change‚ others stay the same… We began three years ago with dreams of catalysing an interest in computing in India. In January 2001
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crypt-arithmetic‚ Verbal arithmetic ‚ cryptarithm or word addition‚ is a type of mathematical puzzle in which most or all of the digits in a mathematical expression‚ such as a sum‚ are substituted by letters or other symbols. In a typical puzzle‚ there is a one-to-one correspondence between the numbers and the letters or symbols replacing them. That is‚ the same digit is always represented by the same letter or symbol. The objective of the puzzle is to break the code used. That is‚ to replace
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