Problems based on Numbers Test 6

© examsiri.com

Question : 39 of 40

Marks: +1, -0

If

1^3+2^3+3^3+...+50^3=1625625

then find the value of

7 +56 +189+ ...... +875000.

11379375
43298700
67119235
12319635
10098385

Solution:

1^3+2^3+3^3+...+50^3=1625625

7+ 56+ 189 +... +8,75,000

=7 (1 +8 +27+ ... +1,25,000 )

=7(1^3+2^3+3^3+...+50^3)

= 7 × 16,25,625

= 11,379,375

© examsiri.com

Go to Question:

Prev Question

Next Question