Start learning 50% faster. Sign in now
(a) According to the rule, 'one of the' is followed by a plural noun and a singular form of a verb, so the use of options (b) and (d) is incorrect. Option (c) does not give a meaningful sentence moreover, the use of 'were' is incorrect. So, option (a) is contextually and grammatically correct as it discusses the concern related to the contact ratio of the gear pair i.e., to work on optimisation. Hence, option (a) is correct.
15, 120, 840, 5040, ?, 100800
11 22.5 47 102 236 ?
...What will come in place of the question mark (?) in the following series?
2.5, 6.5, 18.5, 54.5, 162.5, 486.5, ?
140, 146, 158, 176, ?, 230
17 18 14 ? 7 32
...10, 10, 30, 150, ?, 9450
17, 19, 41, 127, 513, ?
116, 118, 124, 136, 156, ?
-1, 5, 23, 59, ?
84, 97, ?, 162, 214, 279