Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 72 · 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.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 50 (b) not enough info (c) 10 (d) 5
2. 2.🧩 A box has 7 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 11 (b) not enough info (c) 28 (d) 32
3. 3.🧩 Ishaan bought 3 notebooks for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹60 (c) ₹165 (d) ₹55
4. 4.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) not enough info (c) 4 PM (d) 3 PM
5. 5.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 3 PM
6. 6.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) yes, it is certain (d) no mango is sweet
7. 7.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Saanvi is 11 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) not enough info (b) 16 (c) 12 (d) 13
9. 9.🧩 Arjun is 11 years old. Meera is older than Arjun. How old is Meera? (a) 12 (b) 16 (c) not enough info (d) 13
10. 10.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
11. 11.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 4 PM (d) 5 PM
12. 12.🧩 A box has 8 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 14 (c) 48 (d) 54
13. 13.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
14. 14.🧩 Ananya is 11 years old. Vihaan is older than Ananya. How old is Vihaan? (a) 12 (b) 16 (c) not enough info (d) 13
15. 15.🧩 Rohan is 6 years old. Ananya is 6 years older than Rohan. How old is Ananya? (a) 13 (b) not enough info (c) 12 (d) 6
16. 16.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 4 PM
17. 17.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
18. 18.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
19. 19.🧩 A box has 3 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 18 (b) 9 (c) 24 (d) not enough info
20. 20.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
22. 22.🧩 A box has 6 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 14 (b) not enough info (c) 48 (d) 56
23. 23.🧩 Diya is 6 years old. Rohan is 4 years older than Diya. How old is Rohan? (a) 11 (b) not enough info (c) 4 (d) 10
24. 24.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Aarav is 8 years old. Ishaan is older than Aarav. How old is Ishaan? (a) not enough info (b) 13 (c) 9 (d) 10
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
28. 28.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 4 PM
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
30. 30.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
31. 31.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 60 (b) 12 (c) not enough info (d) 6
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
33. 33.🧩 Tara bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹25 (c) ₹40 (d) not enough info
34. 34.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
35. 35.🧩 Meera bought 6 pens and a water bottle for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹23 (b) ₹140 (c) ₹134 (d) not enough info
36. 36.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Kabir bought 2 balls and a cap for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹75 (b) ₹150 (c) not enough info (d) ₹148
38. 38.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) facts that support it (d) a guess
39. 39.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
40. 40.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 6 (b) 60 (c) not enough info (d) 12

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