Instructions
Find out the wrong number in the given following sequence.
Solution
$$(7+1) \times 0.5 = 4$$
$$(4+1)\times 1 = 5$$
$$(5+1)\times 1.5 = 9$$
$$(9+1)\times 2 = 20$$
$$(20+1)\times 2.5 = 52.5$$
$$(52.5+1)\times 3 = 160.5$$
$$\therefore$$The incorrect number is 6.
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