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Consider all possible 8-digit binary strings having four 1s and four 0s. What is the sum of all such numbers? (Note:- a string can have a leading 0)
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Let f(n) denote the square of the sum of the digits of n. Let f ^2(n) denote f(f(n)), f ^3(n) denote f(f(f(n))) and so on.
Then f 1998(11) = ??
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fn ={ 2^n-1 + 1, n is odd
2^n-1 - 1,n is even
find remainder when f1+ f2 + f3....f100 is divided by 127
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Let x be the smallest integer such that the number N = (16^x) (5^800) has 805 digits. Then the sum of digits of N is
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All possible pairs are formed from the divsors of 21600. How many such pairs have a HCF of 45??
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find the 2nd term of an AP. If sum of first 5 even terms is 15 and sum of 1st 3 terms is -3.
plz provide the solu.
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K is a 3 digit number such that ration of the no. to the sum of its digit is least. What is the diff between hundredth and tenth digits of the number.
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28383rd term of 1234567891011121314.......
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What will be the last 2 digits?
(10^3+9^3)^1000 / 12^3
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Find the smallest possible integer n for which (2^2-1)(3^2-1)(4^2-1).....(n^2-1) is a perfect square.
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two digits selected from 0,1,2,3,4,5,6,7,8,9.slip on which code is handwritten allows confusion b/w top n bottom coz dey r indistinguishable.e.g 91 can be confused with 16. how man codes are there such dat there is no possibility of any confusion ?
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A boy multiplies 987 by a certain number beginning with 5 and obtains 559981 as his answer.If in the answer ,both 9's are wrong,correct answer will be
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Let S denote the sum of three natural numbers. Let D denote the sum of the products of them taken two at a time. Let P denote their product. If 3S + D = 2P, how many combinations are there for the numbers?
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What is the remainder when 3^1001 is divided by 1001??
find the base of the number system if 14,31,62 forms GP in that system
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