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Mathematics fun
- 1. SHELIN ELIZABETH VARGHESE B.Ed MATHEMATICS REG NO13304013 NSS B.Ed TRAINING COLLEGE
- 2. MATHEMATICS Iam an odd number. Take away one letter and I become even. What number am I? Answer: Seven (take away the ‘s’ and it becomes ‘even’). Using only addition, how do you add eight 8’s and get the number 1000? Answer: 888 + 88 + 8 + 8 + 8 = 1000 Sally is 54 years old and her mother is 80, how many years ago was Sally’s mother three times her age? Answer: 41 years ago, when Sally was 13 and her mother was 39.
- 3. Which 3numbers have the same answer whether they’re added or multiplied together? Answer: 1, 2 and 3. There is a basket containing 5 apples, how do you divide the apples among 5 children so that each child has 1 apple while 1 apple remains in the basket? Answer: 4 children get 1 apple each while the fifth child gets the basket with the remaining apple still in it. There is a three digit number. The second digit is four times as big as the third digit, while the first digit is three less than the second digit. What is the number? Answer: 141
- 4. What wordlooks the same backwards and upside down? Answer: SWIMS Two girls were born to the same mother, at the same time, on the same day, in the same month and in the same year and yet somehow they’re not twins. Why not? Answer: Because there was a third girl, which makes them triplets! A ship anchored in a port has a ladder which hangs over the side. The length of the ladder is 200cm, the distance between each rung in 20cm and the bottom rung touches the water. The tide rises at a rate of 10cm an hour. When will the water reach the fifth rung?
- 5. Answer: The tideraises both the water and the boat so the water will never reach the fifth rung. ABCD × E = DCBA (Replace letters with digits and have the sum be true. A,B,C,D and E are all different digits.) Answer 2178 × 4 = 8712
- 6. MATHS INTERESTING ANDAMAZING FACTS * The word MATHEMATICS comes from a Greek mathema which means learning, study,science. * Dyscalculia means difficulty in learning mathematics,such as difficulty difficulty in understanding numbers, and learning maths fact. * Mathematics is an anagram of ‘me asthmatic‘ *The number 5 is pronounced as 'Ha' in Thai language.555 is also used by some as slang for 'HaHaHa'. * Different names for the number 0 include zero, nought, naught, nil, zilch and zip. * Zero ( 0 ) is the only number which cannot be represented by Roman numerals. * The name 'zero' derives from the Arabic word sifr which also gave us the English word 'cipher' meaning 'a secret way of writing'. * Do you know the magic of no. nine (9)? Multiply any number with nine (9 ) and then
- 7. sum all individualdigits of the result (product) to make it single digit, the sum of all these individual digits would always be nine (9). *Here is an interesting trick to check divisibility of any number by 3.A number is divisible by three if the sum of digits is divisible by 3. *The = sign ("equals sign") was invented by 16th Century Welsh mathematician Robert Recorde, who was fed up with writing "is equal to" in his equations. * Googol (meaning and origin of Google brand ) is the term used for a number 1 followed by 100 zeros and that it was used by a nine year old Milton Sirotta in 1940. * The spiral shapes of sunflowers follow a Fibonacci sequence. * The word hundred is derived from the word “hundrath”, which actually means 120 and not 100. *111,111,111 × 111,111,111 = 12,345,678,987,654,321. * (6 × 9) + (6 + 9) = 69. *10! seconds is exactly 6 weeks.
- 8. as fed ofany number by number 3.A number is divisible by three if the sum of its digits is divisible by three (3).Here is an interesting trick to check divisibility of any number by number 3.A number is divisible by three if the sum of its digits is divisible by three (3).