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2. Counterfeit banknote detection pen - Wikipedia

   en.wikipedia.org/wiki/Counterfeit_banknote...

   A counterfeit banknote detection pen, used to detect fake banknotes. A counterfeit banknote detection pen is a pen used to apply an iodine-based ink to banknotes in an attempt to determine their authenticity. The ink reacts with starch in wood-based paper to create a black or blue mark but the paper in a real bill contains no starch, so the pen ...

3. Marker pen - Wikipedia

   en.wikipedia.org/wiki/Marker_pen

   The tip of a green felt-tip pen A box of colored felt-tip pens Marker pen. A marker pen, fine liner, marking pen, felt-tip pen, felt pen, flow marker, sign pen (in South Korea), vivid (in New Zealand), flomaster (in Russia), texta (in Australia), sketch pen (in South Asia), koki (in South Africa) or simply marker is a pen which has its own ink source and a tip made of porous, pressed fibers ...

4. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more than t boxes need to be bought ...

5. Walmart has a Canon all-in-one printer for $29, and I ... - AOL

   www.aol.com/lifestyle/walmart-canon-one-printer...

   Works for me! Enter the Canon Pixma MG2522 all-in-one, currently on sale at Walmart for just $29. You'd be hard-pressed to buy a single ink cartridge for $29, let alone an entire printer. $29 $40 ...

6. REI's Anniversary Sale coupons have arrived, here's what we ...

   www.autoblog.com/article/reis-anniversary-sale...

   20% off one full-price item: Yeti Tundra 65 Cooler - $90 off. Yakima CBX 18 Roof Box - $220 off. Yakima OffGrid Cargo Basket - $140 off. Yakima TopWater Rooftop Fishing Rod Box - $125 off. Kuat NV ...

7. Coupon - Wikipedia

   en.wikipedia.org/wiki/Coupon

   Coupon. In marketing, a coupon is a ticket or document that can be redeemed for a financial discount or rebate when purchasing a product . Customarily, coupons are issued by manufacturers of consumer packaged goods [1] or by retailers, to be used in retail stores as a part of sales promotions. They are often widely distributed through mail ...