Question
If in the number '647315368', 1 added to all the odd
numbers, then what is the sum of the digits which are repeating more than two times in the new number thus formed? Note: While taking the sum the repeating digit is to be considered only once.Solution
6Â Â Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â 7Â Â Â Â Â Â Â Â Â 3Â Â Â Â Â Â Â Â Â 1Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â 3Â Â Â Â Â Â Â Â Â 6Â Â Â Â Â Â Â Â Â 8 6Â Â Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â 8Â Â Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â 2Â Â Â Â Â Â Â Â Â 6Â Â Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â 6Â Â Â Â Â Â Â Â Â 8 So, the digits that are repeating more than two times are '6' and '4'. So, sum = (6 + 4) = 10.
How many pairs of natural numbers (x, y) exist such that x>y and the product of x, y and HCF (x, y) = 2520? solve thisÂ
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A circular wire of diameter 63 cm is folded in the shape of a rectangle whose sides are in the ratio 5:4. Find the area enclosed by the rectangle.
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The HCF of two numbers is 14. Which of the following can never be their LCM?
What are the Highest Common Factor and Lowest Common Multiple of 6, 72, 120?
Calculate the Least Common Multiple (L.C.M) of 144 and 180.
The least number which when divided by 5, 15 and 25 leave a same remainder 2 in each case?Â
The LCM of two numbers is 63 and their HCF is 7. How many such pairs of numbers are possible?
Find the smallest multiple of 10 that, when divided by 4, 6, and 9, leaves a remainder of 4 in each case.
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