Irhan Adam Iftikar and Imran Aidan Iftikar They are students of the Greenwich Country Day School, Greenwich, CT, USA  

A.1241. The Book of Little Magicians contains 45 pages. When numbering its pages they used only even digits. (For example: the number on the 3rd page is 6. ) What number is on the last, the 45th, page? Which page has …
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B.1241. There are three different kinds of chocolate you can buy in the candy store around the corner. If you buy a bar of chocolate with peanuts and a bar of chocolate with almond you pay $3.50. If you buy 4 …
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C.1241. In an isosceles triangle the angle between the two congruent sides is 120 degrees. Draw the bisecting perpendicular of both of the congruent sides so that they would intercept the base of the triangle. What size of pieces will they …
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  Filbert Ephraim Wu In 2016-2017, as a Grade 6 student of the Victory International School, Taguig City, Philippines, he finished in Second Place in the 5th-6th Grade category of the Paul Erdo”s Math Challenge. In 2017-2018, as a Grade 7 …
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C.1233. Find the two smallest positive integers that give a remainder of 2 when divided by either 3 or 7, and give a remainder of 3 when divided by 5. C.1234. The first three elements of a number sequence are 1, 2, …
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B.1233. I thought of an integer. I multiplied it by 10 and I added the original number to the product. The first three digits of the resulting number are 350. What was the smallest positive integer I could have started with? …
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A.1233. Olga’s dad is building a fence around their rectangular shape garden. One side of the garden is three times as long as another side. He used three times as much chicken wire (672 meters more) than he needed. When he …
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A.1225. There was a dog race in the meadow. The German Shepherd, the Rottweiler, the Labrador, and the Cocker Spaniel all ran very fast but still not with the same speed. The German Sheppard ran 320 meters in 20 seconds, the …
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B.1225. The solid below was built by using red and white 1cm x 1cm x 1cm unit cubes. We indicated the lengths of a few edges of the solid. The center region, as shown on the diagram is all red, and …
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