Practice30Create account

An AP has 12 terms. Its first term is -7 and its last term is 125. Find the common difference.

Class 10nth Term of an APAlgebra — Sequences
  • A11
  • B132
  • C-12
  • D12

Step-by-Step Solution

The 12th term is a + 11d, so 125 = -7 + 11d, giving 11d = 132 and d = 12. Dividing the rise 132 by 12 instead of 11 gives 11; 132 is the total rise, not the step; -12 is the right size with the wrong sign (the AP increases).
Answer: D) 12

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All nth Term of an AP practice questions

More Class 10 nth Term of an AP practice

Which term of the AP 5, 17, 29, 41, ... is equal to 137?Which term of the AP 90, 84, 78, 72, ... is -30?A student claims that 180 is a term of the AP 4, 13, 22, 31, ... Is the claim correct?For the AP 82, 75, 68, 61, ... find the first term that is negative and state its value.An AP has 21 terms. Its first term is 7 and its last term is 87. Find its middle term.