Find the next number in the series.
4, 9, 20, 43, ?
$$4\times\ 2+1=9$$,
$$9\times\ 2+2=20,$$
$$20\times\ 2+3=43,$$
$$43\times\ 2+4=90,$$
Hence option 'D' is correct.
Create a FREE account and get:
Day-wise Structured & Planned Preparation Guide
By proceeding you agree to create your account
Free CAT Schedule PDF will be sent to your email address soon !!!
