engineering recuitment FSSAI Assistant Mock Test 2021 Quantitative Aptitude Number System Quick Math
\(\frac{1}{{20\; \times\: 21}} + \frac{1}{{21\; \times\:22}} + \frac{1}{{22\; \times\: 23}} + \ldots + \frac{1}{{119\: \times \:120}} = \;?\)
1
1/24
2
5/20
3
3/23
4
1/15