Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Progression Arithmetic Progression
A series is in A.P, If the last term is 21 and sum of all 10 terms is 120, then find the sum of first three terms.
1
15
2
21
3
20
4
More than one of the above
5
None of the above