Find out mental age of a 14 year old girl, Radhika with an IQ of 100.

IQ= (MA/CA)*100

100= (MA/14)*100

MA=(14*IQ)/100

MA=(14*100)/100

MA=14

When the MA equals the CA, the IQ equals 100. If MA is more than the CA, IQ is more than 100. IQ becomes less than 100 when the MA is less than the CA.