Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 383 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 5 PM (c) 3 PM (d) not enough info
2. 2.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 5 PM
3. 3.🧩 Aarav bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹25 (c) ₹20 (d) ₹60
4. 4.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) yes, mangoes match (d) no mango is sweet
5. 5.🧩 Ishaan bought 6 kites and a water bottle for ₹380 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹380 (c) ₹374 (d) ₹63
6. 6.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) not enough info (b) 7 (c) 70 (d) 14
7. 7.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
8. 8.🧩 Ishaan bought 6 notebooks and a water bottle for ₹340 in all. Each notebook cost the same. What did one notebook cost? (a) ₹334 (b) ₹340 (c) not enough info (d) ₹56
9. 9.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 10 (b) 5 (c) not enough info (d) 50
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
11. 11.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
12. 12.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
13. 13.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 5 PM
14. 14.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
17. 17.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
18. 18.🧩 Vihaan bought 3 notebooks for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) ₹165 (b) ₹60 (c) ₹55 (d) not enough info
19. 19.🧩 Rohan is 9 years old. Saanvi is 2 years older than Rohan. How old is Saanvi? (a) 12 (b) 11 (c) 2 (d) not enough info
20. 20.🧩 Ishaan bought 4 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹200 (b) ₹50 (c) ₹55 (d) not enough info
21. 21.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
22. 22.🧩 Kabir is 10 years old. Tara is older than Kabir. How old is Tara? (a) not enough info (b) 12 (c) 15 (d) 11
23. 23.🧩 Nisha is 9 years old. Arjun is 9 years older than Nisha. How old is Arjun? (a) not enough info (b) 9 (c) 18 (d) 19
24. 24.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
25. 25.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
26. 26.🧩 Saanvi is 7 years old. Tara is 7 years older than Saanvi. How old is Tara? (a) 14 (b) 7 (c) 15 (d) not enough info
27. 27.🧩 A box has 3 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 20 (b) not enough info (c) 15 (d) 8
28. 28.🧩 Saanvi bought 3 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹90 (d) ₹35
29. 29.🧩 Meera bought 3 notebooks for ₹105 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹105 (c) ₹35 (d) not enough info
30. 30.🧩 Ishaan bought 3 kites for ₹30 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹10 (c) ₹15 (d) ₹30
31. 31.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
32. 32.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 5 (b) 10 (c) 50 (d) not enough info
33. 33.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
34. 34.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
35. 35.🧩 Tara bought 5 notebooks and a cap for ₹280 in all. Each notebook cost the same. What did one notebook cost? (a) ₹275 (b) ₹280 (c) not enough info (d) ₹56
36. 36.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
38. 38.🧩 Tara is 8 years old. Rohan is 9 years older than Tara. How old is Rohan? (a) 18 (b) 17 (c) 9 (d) not enough info
39. 39.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) not enough info (b) 10 (c) 5 (d) 50
40. 40.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 5 PM

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