Brain Exercises – November 15

Math Mindworks

    1. Replace the question marks with mathematical symbols to produce the correct answer.  Only the four basic operators (+,- ,X and divided by) are permitted.  Perform calculations in strict left to right order.  Can you find all three possible solutions?

    4  ?   3 ?  1 ? 2  = 9

    2. Same directions

    3 ? 8 ? 4 ? 2 = 14

    3. 7 ? 6 ? 5 ? 4 ? = 2

    4. What number should replace the question mark in the following sequence?

    100 ,98.75, 96.25, 95, 92.5, ?

    5. Which of these is the odd number out?

               17, 71, 88, 88, 176, 671, 846

    Double Trouble

    In this game, you will be given the second half of some compound words.  You must identify the one word that precedes each of them to make a compound word.  For example, given the words Weed, coast and sick, the one word that makes each a compound word. Is sea.

    1. Cushion, stripe, wheel, point, ball
    2. Study, wear, privileged
    3. Maker, stick, box, book
    4. Quake, shaking, worm
    5. Back, house, land, grocer
    6. Proof, melon, fall, color
    7. Bow, coat, drop, forest
    8. Beam, shine, walk, light
    9. Hammer, ass, knife, pot
    10. Land, berg, box, breaker

    Answers

    Math Mindworks

    1. (4 X 3) – 1 – 2 = 9

    ((4 X3) divided by 1) + 2 = 9

    (( 4 divided by  3) X 1) + 2 = 9 

    2. ((3 X 8) divided by 4) divided by 2 = 14

    (3 + 8 – 4) X 2 = 14

    3. 7 -6 + 5 – 4 = 2

    (7+ 6 -5 ) divided by 4 = 2

    4. 9.25.  Deduct 1.25, the 2.5 alternately

    5. 846.   It should be 847 since each number is reversed then added on to the previous number.

    Double Trouble

    1. Pin
    2. Under
    3. Match
    4. Earth
    5. Green
    6. Water
    7. Rain
    8. Moon
    9. Jack
    10. Home