Which Number is Missing in the Sequence? Only Those with High IQs Can Figure It Out

A new brain teaser is circulating, designed to test mathematical skills and cognitive function by challenging individuals to identify a missing number in a sequence. The puzzle, presented by Mirror, suggests that solving it quickly is indicative of a high IQ.

The sequence provided is as follows: 7 = 42, 6 = 30, and 5 = 20. Readers are tasked with determining the value for three, without being explicitly told the value for four. Initially, one might assume a simple arithmetic progression, such as adding 10 each time, but this pattern fails when applied to the given value for seven (7 = 42).

The solution lies in recognizing a multiplication pattern. The rule is that each number in the sequence is multiplied by the number that comes immediately before it. For instance, 7 = 42 because 7 multiplied by 6 equals 42. Similarly, 6 = 30 is derived from 6 multiplied by 5, and 5 = 20 is the result of 5 multiplied by 4.

Following this established pattern, the value for four would be 4 multiplied by 3, equaling 12. Consequently, the missing number for three is calculated as 3 multiplied by 2, which equals 6. The article emphasizes that regular brain exercise through puzzles can enhance cognitive functions, making such challenges a valuable tool for mental acuity.