Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 402 · 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.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
2. 2.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
7. 7.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 18 (b) not enough info (c) 90 (d) 9
8. 8.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
9. 9.🧩 Ananya bought 2 pens and a lunch box for ₹130 in all. Each pen cost the same. What did one pen cost? (a) ₹130 (b) ₹128 (c) ₹65 (d) not enough info
10. 10.🧩 Saanvi is 12 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 17 (b) 13 (c) not enough info (d) 14
11. 11.🧩 Rohan bought 6 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹35 (c) ₹180 (d) ₹30
12. 12.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Arjun bought 3 pens for ₹105 in all. Each pen cost the same. What did one pen cost? (a) ₹40 (b) ₹35 (c) not enough info (d) ₹105
15. 15.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 2 PM (d) 5 PM
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
17. 17.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
18. 18.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
21. 21.🧩 Meera bought 6 notebooks and a water bottle for ₹430 in all. Each notebook cost the same. What did one notebook cost? (a) ₹430 (b) not enough info (c) ₹71 (d) ₹424
22. 22.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
23. 23.🧩 Meera is 6 years old. Arjun is older than Meera. How old is Arjun? (a) 11 (b) 8 (c) 7 (d) not enough info
24. 24.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
25. 25.🧩 Nisha is 6 years old. Diya is older than Nisha. How old is Diya? (a) not enough info (b) 8 (c) 7 (d) 11
26. 26.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) 8 (c) 16 (d) not enough info
27. 27.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 9 (b) not enough info (c) 18 (d) 90
28. 28.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a rumour (d) a guess
29. 29.🧩 Meera is 11 years old. Kabir is 8 years older than Meera. How old is Kabir? (a) 20 (b) 8 (c) not enough info (d) 19
30. 30.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
31. 31.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
32. 32.🧩 A box has 3 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 11 (b) not enough info (c) 24 (d) 32
33. 33.🧩 Tara bought 4 notebooks and a water bottle for ₹230 in all. Each notebook cost the same. What did one notebook cost? (a) ₹230 (b) ₹57 (c) not enough info (d) ₹226
34. 34.🧩 Meera bought 3 markers and a bag for ₹85 in all. Each marker cost the same. What did one marker cost? (a) ₹85 (b) ₹82 (c) ₹28 (d) not enough info
35. 35.🧩 Aarav bought 5 notebooks for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹55 (c) ₹250 (d) not enough info
36. 36.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 6 PM
37. 37.🧩 Vihaan bought 3 kites for ₹75 in all. Each kite cost the same. What did one kite cost? (a) ₹75 (b) ₹25 (c) not enough info (d) ₹30
38. 38.🧩 Arjun bought 2 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹35 (c) ₹30 (d) ₹60
39. 39.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
40. 40.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False

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