Start learning 50% faster. Sign in now
Sum of first 10 terms is equal to sum of first 12 terms. Sum of first 12 terms = Sum of first 10 terms + 11th term + 12th term 11th term + 12thterm = 0 Let 11thterm = k, common ratio = r 12thterm will be = kr k + kr = 0 k (1 + r) = 0 r = -1 as k cannot be zero Common ratio = -1 Now, sum of 15 terms = a(r - 1)/(r - 1) = 31 ⇒ a(-1 -1)/(-1 -1) = 31 ⇒ a = 31 ∴ Third term = ar = 31 × (-1) = 31
28% of a certain number is added to 82% of the same number, resulting in 125% of 484. If 150 is subtracted from this number, what is 35% of the resultin...
0! +1! +2! +3!........+98! What will be the remainder when divided by 5?
The product of two positive numbers is 432. If one number is three times the other, find the difference between the two numbers.
Find the sum of all those 3-digit numbers which when divided by 10 leave a remainder of 5.
Find the smallest number that, when divided by 3, 4, 5, and 6, leaves a remainder of 2 but is divisible by
Sum of squares of three consecutive numbers is 1325. Find the sum of first and third number.
Find the third proportion of 35 and 14.