exam Maths Puzzle Numerical Ability

please help me to solve this question.

Determine the present value of a series of 25 semi-annual payments of Rs.10,000 each and which begins in 6 months.Assume interest at a rat

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exam Other Question

Help with writing equation in its equivalent exponential form.
6 = log(low)2. 64
6= log2 64 (the number 2 is suppose to be in the bottom right hand corner. Please help me solve my assignment..
my questions are:

1). -3 1/4 + 1/2 =

2). 3 + -4/5 =

3). -2 1/8 + -1 1/4 =

4). -25 + -17/3 =

thank you...