Ans: Look at the pattern. The result is formed by joining two values:
Detective 1 → 1 × 1 = 1…. 1 + 1 = 2 → 12
Multiply 1 &1 and add 1 & 1. write the result beside each other.
Detective 2 → 2 × 2 = 4 and 2 + 2 = 4 → 44
Detective 3 → 3 × 3 = 9 and 3 + 3 = 6 → 96
Detective 4 → 4 × 4 = 16 and 4 + 4 = 8 → 168
Detective 5 → 5 × 5 = 25 and 5 + 5 = 10 → 2510
The number for 6th Detective = 3612. The first two digits are 6x6 = 36. The last two digits are 6 + 6 = 12
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Ans: 2 days.
If the dough doubles every hour, it will take 48 hours for Peter to have enough dough for half his shelves as in the 48th hour it will double again to fill all the shelves. 48 hours = 48 24 = 2 days.
Ans: 23 Zeros = 11 + 11 + 1
From 1 to 100: 10, 20, 30, 40, 50, 50, 70, 80, 90, 100 = 11 zeroes
From -1 to -100: 11 zeroes
Count the number 0 itself.
Ans:
Hint: You can use a combination of single-digit, double-digit and three-digit numbers.
Ans: 888 + 88 + 8 + 8 + 8 = 1000
Ans:
Hint: Separate 98 using place value rules first.
Ans: Multiplication. 90 x 8 = 720
Ans: 8.
There are 7 sides in a Heptagon, so one more is 8. It is also less than 10 and more than 4.
Ans:
The second digit is 3 x third digit. If the second digit is 1, the third digit is 3. If the second digit is 2, the third digit is 6. If the second digit is 3, the third digit is 9.
Fourth digit is 0. as 0 x any number x 0 = 0.
Numbers are: _ 310, _ 620, _930. Now lets compute the first number.
1310,4620,7930
Ans: 36 people
Total Volume of juice = 2.7 L = 2,700 mL
Volume of juice in one cup = 75% of 100 mL = 75 mL
No. of people = Total volume of juice Volume of juice in one cup = 2,700/ 75 = 36 people
Ans:
34 – 9 = I am 25 years old and my father will be 50.
Answer for question 4
Hint: It is a single digit number.
Ans: Seven. Remove ‘s’ and it becomes ‘even’.
Answer for question 5
Ans: Zero. Anything multiplied with 0 is always 0.
Hint: Try to add the digits in different combinations and use the = sign.
Ans: 3 + 6 = 4 + 5
Answer:
44 – (4/4) = 43
Answer:
A decimal point!
Eg: 1.2 is greater than 1 but less than 2.