     Puzzle 73 Using all of the letters of the alphabet, once only, complete these words: -E--A -UI-AR --ICK -A- BO- -OWE- -ON-EY -EL RA- ---KAGE --LL MO-- -EAP -EEP -UN [Puzzle Code = ZKWM] Copyright © Kevin Stone    Direct Link: www.brainbashers.com?ZKWM Hint: There are three animals. Answer: Zebra, guitar, quick, way, box, vowel, monkey, eel, raj, package, sill, moon, heap, deep, fun. Zebra, guitar, quick, say, box, vowed, monkey, eel, raj, package, hill, moon, leap, weep, fun. Zebra, guitar, quick, sad, box, vowel, monkey, eel, ray, package, will, moon, heap, jeep, fun. Zebra, guitar, quick, jam, box, vowel, donkey, eel, ray, package, will, moon, heap, seep, fun. Zebra, guitar, quick, jaw, box, vowel, monkey, eel, ray, package, fill, moon, heap, deep, sun. Zebra, guitar, quick, lay, box, vowed, monkey, eel, ran, package, will, mojo, heap, seep, fun. Puzzle 74 Using the new BrainBashers programming language, BrainBasic, the following words have their equivalents next to them, what should FOX be? CLICK = 100501100K MILK  = 1000150K LOG   = 50OG LIFE  = 501FE ALIVE = A5015E FOX   = ==?== [Puzzle Code = ZWTB] Copyright © Kevin Stone    Direct Link: www.brainbashers.com?ZWTB Hint: Think of Roman numerals. Answer: FO10. Where Roman numerals exist they are replaced by their modern equivalents. CLICK = 100 50 1 100 K I = 1 V = 5 X = 10 L = 50 C = 100 D = 500 M = 1000 Puzzle 75 In the following sum the digits 0 to 9 have all been used, O = Odd, E = Even, zero is even and the top row's digits add to 9. Can you determine each digit? [Puzzle Code = ZVZB] Copyright © Kevin Stone    Direct Link: www.brainbashers.com?ZVZB Hint: The largest possible numbers could start with 6 and 8, therefore the first digit of the answer is 1. Answer: Remembering that:   E + E = E    O + O = E    E + O = O To discuss individual letters it's easiest to represent the sum as:   A B C    D E F + --------  G H I J The largest values for A and D are 6 and 8, which makes G = 1. Since column 2 is E + O = O there can be no carry from column 1 (since E + O + 1 is always even). Therefore C and F are 3 and 5 (but we don't yet know which is which), therefore J = 8. There can't be a carry from column 2 (as A + D is even) therefore E can't be 9 as this would force a carry. Therefore I = 9. Hence B can't be 0. Therefore H = 0. The last remaining odd number makes E = 7. Making B = 2. Therefore A and D are 4 and 6 (but we don't yet know which is which). Since the top row's digits have to add to 9 the top number must be 423. This makes the sum 423 + 675 = 1098. Puzzle 76 A large fresh water reservoir has two types of drainage system. Small pipes and large pipes. 6 large pipes, on their own, can drain the reservoir in 12 hours. 6 small pipes, on their own, can drain the reservoir in 18 hours. How long will 6 large pipes and 6 small pipes take to drain the reservoir? [Puzzle Code = ZNEC] Copyright © Kevin Stone    Direct Link: www.brainbashers.com?ZNEC Hint: What would happen in 36 hours? Answer: 7 hours and 12 minutes. Firstly we find a time that both 12 hours and 18 hours would fit in to... In 36 hours:    6 large pipes can drain 3 reservoirs.    6 small pipes can drain 2 reservoirs. Therefore, together, 6 large and 6 small pipes can drain 5 reservoirs. 36 hours ÷ 5 = 7.2 hours. 7.2 hours = 7 hours and 12 minutes.     