Question

question 1: choose the two numbers that when multiplied have a result close to 3100 (the result will be the only number between 2900 and 3300)
9.27
49.1
62.1
73.9
519
question 2: choose the two numbers that when multiplied have a result close to 2500 (the result will be the only number between 2300 and 2700)
3.12
4.22
47.2
63.3
571
question 3: choose a percent from the left - hand column and a number from the right - hand column that give a percent calculation with a result close to 1200 (the result will be the only number between 1000 and 1400)
2.72% 486
21.3% of 3270
6020
question 4: choose a percent from the left - hand column and a number from the right - hand column that give a percent calculation with a result close to 13 (the result will be the only number between 11 and 15)
2% 49.8
17.7% of 672
778

Explanation:

Question 1:

Step1: Calculate each pair product

$9.27 \times 519 = 4811.13$
$49.1 \times 73.9 = 49.1\times70 + 49.1\times3.9 = 3437 + 191.49 = 3628.49$
$62.1 \times 519 = 32229.9$
$49.1 \times 519 = 25482.9$
$62.1 \times 73.9 = 62.1\times70 + 62.1\times3.9 = 4347 + 242.19 = 4589.19$
$9.27 \times 73.9 = 9.27\times70 + 9.27\times3.9 = 648.9 + 36.153 = 685.053$
$9.27 \times 49.1 = 455.157$
$9.27 \times 62.1 = 575.667$
$49.1 \times 62.1 = 3049.11$
$73.9 \times 519 = 38354.1$

Step2: Filter range 2900-3300

Only $49.1 \times 62.1 = 3049.11$ fits.

Question 2:

Step1: Calculate each pair product

$3.12 \times 571 = 1781.52$
$4.22 \times 63.3 = 267.126$
$47.2 \times 571 = 26951.2$
$63.3 \times 571 = 36144.3$
$4.22 \times 571 = 2409.62$
$3.12 \times 63.3 = 197.496$
$3.12 \times 47.2 = 147.264$
$4.22 \times 47.2 = 199.184$
$3.12 \times 4.22 = 13.1664$
$47.2 \times 63.3 = 2987.76$

Step2: Filter range 2300-2700

Only $4.22 \times 571 = 2409.62$ fits.

Question 3:

Step1: Calculate each percent product

$2.72\% \times 486 = 0.0272\times486 = 13.2192$
$2.72\% \times 3270 = 0.0272\times3270 = 88.944$
$2.72\% \times 6020 = 0.0272\times6020 = 163.744$
$21.3\% \times 486 = 0.213\times486 = 103.518$
$21.3\% \times 3270 = 0.213\times3270 = 696.51$
$21.3\% \times 6020 = 0.213\times6020 = 1282.26$

Step2: Filter range 1000-1400

Only $21.3\% \times 6020 = 1282.26$ fits.

Question 4:

Step1: Calculate each percent product

$2\% \times 49.8 = 0.02\times49.8 = 0.996$
$2\% \times 672 = 0.02\times672 = 13.44$
$2\% \times 778 = 0.02\times778 = 15.56$
$17.7\% \times 49.8 = 0.177\times49.8 = 8.8146$
$17.7\% \times 672 = 0.177\times672 = 118.944$
$17.7\% \times 778 = 0.177\times778 = 137.706$

Step2: Filter range 11-15

Only $2\% \times 672 = 13.44$ fits.

Answer:

1. 49.1 and 62.1
2. 4.22 and 571
3. 21.3% OF 6020
4. 2% OF 672