Hello friends

Please help me in understanding following SI questions.

1) what is the present worth of Rs 132 due in 2 years at 5% simple interest per annum ?
a) Rs 112 b) 118.80 c) Rs 120 d) Rs 122

doubt that i have " what does the present worth means" . ans is c

2) The sum of money lent out at simple interest amounts to Rs 720 after 2 years and to Rs 1020 after a further period of 5 years. the sum is ?

a) Rs 500 b) Rs 600 c) Rs 700 d) Rs 710

ans is b

3) an automobile financier claims to be lending money at simple interest, but he includes the interest every six months for calculating the principal. If he is charging an interest of 10% the effective rate of interest becomes ?

a) 10% b) 10.25% c) 10.5 d) none of these ans is b

4) A sum of 10$ is lent to be returned in 11 monthly instalments of 1.00 $, interest being simple. the rate of interest is ?

a) 9 1/11 % b) 10% c) 11% d) 21 9/11%

ans is d


general question : in what category will you put the above questions in gmat easy, moderate or tough

thanks