Question
Find the missing term:
src="https://www.ixambee.com/questionimage/CHSL/SSC-CHSL-MT9-E-21.jpg" alt="" width="192" height="144" />Solution
8 × 2 – 1 = 15 12 × 2 – 1 = 23 18 × 2 – 1 = 35
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