The sum of first 9 terms of the series:
(1^3)/(1) + (1^3+2^3)/(1+3) + (1^3+2^3+3^3)/(1+3+5)..... is:
- 96
- 192
- 142
- 71
0 voters
The sum of coefficients of integral powers of x in the binomial expansion of (1-2sqrt(x))^50 is:
- 1/2*(2^50+1)
- 1/2*(3^50+1)
- 1/2*3^50
- 1/2*(3^50-1)
0 voters
If the angle of elevation of the top of a tower from three collinear points A,B and C, on a line leading to the foot of tower are 30*,45* and 60* respectively, then ratio, AB:BC, is:
- sqrt(3):sqrt(2)
- sqrt(3):1
- 2:3
- 1:sqrt(3)
0 voters
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Last two digits of
11^9 - 9^11
123412341234....(89times)
mod 19
The number of order triplets (x, y, z) such that x, y, z are primes and (x^y) + 1 = z is
(a) 0 (b) 1 (c) 2 (d) infinitely many
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find rem , when 1+5+5^2 +5^3+.......+5^25 is divided by 17 .
find the remainder 555555...........93 times divided by 98....
please post approach..
Find the total number of ways in which 35 identical marbles can be distributed among five boys, such that each boy gets an odd number of marbles.
Consider four-digit numbers for which the first two digits are equal and the last two digits are also equal. How many such numbers are perfect squares?
(a) 3 (b) 2 (c) 4 (d) 0 (e) 1
The two positive integers 'p' and 'q' satisfy (p+q)/t = HCF(p,q). Which of the following two numbers sum up to 't'?
13,52
132,96,
65,45
56,45