Question
The average of 20 numbers is calculated as 35. However,
it was later discovered that one of the numbers was mistakenly recorded as 28 instead of 82. What should the correct average of the 20 numbers be?Solution
Total number will be increased by (82-28) = 54 Average will increase by = 54/20 = 2.7 Correct average = 35+2.7 = 37.7
- What is the unit digit of the number 'A' obtained by subtracting the largest two-digit prime number from the least common multiple (LCM) of all single-digi...
The LCM of the two numbers is 12 times their HCF. The sum of LCM and HCF is 429 and if both the number are smaller than their LCM. Find both numbers.
The smallest number which when divided by 29 and 33 leaves remainder 11 and 15 respectively is:
The LCM of two numbers is 432 and their HCF is 55. If one of the numbers is 132, the other number is:
What is the smallest number that needs to be added to or subtracted from 1164 to make it a multiple of 37?
The HCF of two numbers is 21. Which of the following can never be their LCM?
- The sum and difference of L.C.M and H.C.F of two numbers is 312 and 208 respectively. If one of the numbers is 52, find the other number.
The least number which when divided by 9, 12, 15, 18, and 21 leaves the same remainder 7 in each case, is:
- Determine the HCF of 60, 90 and 150
What is the difference between the LCM and HCF of 32, 40?
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