# Monthly Archives: April 2018

## DAY 111:

Today’s Challenge This describes a particular number less than 100:  its digits add up to 12,  if the unit digit is subtracted from the tens digit and doubled, the answer is also 12. What is the number? The 7puzzle Challenge The … Continue reading

## DAY 110:

Today’s Challenge A 7-step question – carry out these instructions:  Work out the sum of 4 and 6,  Calculate the product of 4 and 6,  Find the difference between the two answers in points 1 and 2,  Square the answer … Continue reading

## DAY 109:

Today’s Challenge Last chance to get all seven correct. Be careful as there may be one or two tricky ones!  (1 – 2) – (3 – 4) = ?  4 ÷ 0.5 = ?  What is 25 less than the product of 20 … Continue reading

## DAY 108:

Today’s Challenge Here’s seven more mental arithmetic questions to try.  Can you get all seven correct?  (11 – 5) – (4 + 1) = ?  What is 10 more than –4?  47 × 4 = ?  0.32 ÷ 4 = ?  3/4 × 2/3 … Continue reading

## DAY 107:

Today’s Challenge Here’s seven tricky mental teasers to try:  (18 – 5) – (7 – 17) = ?  128 + 294 = ?  How many seconds are in a quarter-of-an-hour?  How many degrees are in three-quarters of a circle?  (16 – 8) × (13 – 8) … Continue reading

## DAY 106:

Today’s Challenge Here are seven mental arithmetic questions for you to try:  Which number multiplied by itself gives 196?  What is 50 + 400 + 5?  54 – 45 = ?  If Jo can run 10 miles in one hour, … Continue reading

## DAY 105:

Today’s Challenge How quickly can you correctly answer the following seven questions?  (17 – 4) + (12 – 9) = ?  (3 – 2) – (16 – 16) = ?  What is two-thirds plus three-quarters?  109 + 10 = ?  (3 + 16) + (16 … Continue reading

## DAY 104:

Today’s Challenge Here’s a selection of mental arithmetic questions.  Can you get all seven correct?  (10 + 10) – (15 – 3) = ?  What is the sum of 0.83 and 0.89?  What is 1 × 9?  If Ben earns £10 every half-hour, how … Continue reading