Question
If S = 1³ + 2³ + 3³ + … + n³, find S when n =
10.Solution
ATQ,
Formula: S = [n(n+1)/2]² = [10×11/2]² = 55² = 3025.
Find the LCM of 34 and √784.
'A' can complete a task in 24 days, while 'B' can finish the same task in 36 days. However, 'A' works at only 2/3 of his usual efficiency, and 'B' opera...
The difference between the interest earned from investing ₹P in simple interest at an annual rate of 25% and the interest earned from investing the sa...
If '+' means '-' , '-' means 'x' , 'x' means '÷' , '÷' means '+' , then what will be the value of ' 500 x 50 - 20 ÷ 50 + 40 ' = ?Â
...The square of a number is reduced by 26 times the number, and then 169 is added to the result. If the final value is 0, what is the number?
Find two numbers whose highest common factor (HCF) is 24 and least common multiple (LCM) is 144, and determine their product.
Simplify the following expression:
288 ÷ 12 x 6 + 56 x √4 - 676 ÷ 4Find the sum of first 25 even numbers.
Find the simplified value of the given expression: (1/4) of 19 x 12 - (2/5) of 135 + 42.5 x 8 - 142
If A:B = 5:8 and C:B = 4:9 then find the value of (A:B:C) .
