Information and Communication Technology - Number System

1. A student follows the rule 3x 3+ 3x 3= 12, 4x 4+4x 4=16,5 x 5 + 5 x 5 = 20, then find the value of the expression 12 x 12 + '12 x 12 according to this rule.

  • Option : B
  • Explanation : Given pattern is 3 x 3 + 3 x 3 = 12, 4 x 4 + 4 x 4 = 16 and 5 x 5 + 5 x 5 = 20 Here, the numbers of every expression are added. Therefore, 12x12+12x12=12+12+12+12=48
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2. Find the sum of place and face values of 6 in 437699.

  • Option : B
  • Explanation : Place value of 6 in 437699 = 600 Face value of 6 is 437699 = 6 . :. Required sum = 600 + 6 = 606
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3. Find the value of fraction which is shown in the given figure.  

  • Option : C
  • Explanation : Totalnumber of smaller parts =16 and number of shaded parts = 4 ∴ Required fraction = \fn_jvn \small \frac{4}{16} = \fn_jvn \small \frac{1}{4}
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4. Find the difference between the place values of both 4's in 847342

  • Option : A
  • Explanation : Given number is 847342. Place value of first 4 = 40000 Place value of second 4 = 40 :. Required difference = 40000 - 40 = 39960
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5. In 2014, the population of a city is 4.02 million.This number is same as

  • Option : A
  • Explanation : .: 1 million = 106 .: 4.02 X 106 = 4020000
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