Simple interest over several years

Difficulty Standard · Set i3f757

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1
7700 is invested at 8% simple interest for 6 years. How much interest is earned?
2
2100 is invested at 8% simple interest for 2 years. How much interest is earned?
3
800 is invested at 4% simple interest for 4 years. How much interest is earned?
4
3900 is invested at 6% simple interest for 3 years. How much interest is earned?
5
4100 is invested at 4% simple interest for 4 years. How much interest is earned?
6
5200 is invested at 5% simple interest for 4 years. How much interest is earned?
7
800 is invested at 2% simple interest for 6 years. How much interest is earned?
8
4300 is invested at 8% simple interest for 3 years. How much interest is earned?
9
700 is invested at 4% simple interest for 2 years. How much interest is earned?
10
1600 is invested at 4% simple interest for 6 years. How much interest is earned?
11
5700 is invested at 2% simple interest for 6 years. How much interest is earned?
12
5200 is invested at 6% simple interest for 3 years. How much interest is earned?
13
6600 is invested at 2% simple interest for 6 years. How much interest is earned?
14
4200 is invested at 10% simple interest for 5 years. How much interest is earned?
15
4100 is invested at 2% simple interest for 5 years. How much interest is earned?
16
4900 is invested at 6% simple interest for 3 years. How much interest is earned?
17
5400 is invested at 2% simple interest for 5 years. How much interest is earned?
18
5700 is invested at 6% simple interest for 3 years. How much interest is earned?
19
7800 is invested at 10% simple interest for 6 years. How much interest is earned?
20
7100 is invested at 5% simple interest for 2 years. How much interest is earned?

What is in this set

The numbers in this set run from 2 to 8,000.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 100% of the problems: that is the total at the end; the question asks for the interest on its own.
Answers are a whole number.

Drawing 240 problems from this page produced 231 different ones, 96% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 8 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.