Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 562 · 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.🧩 Tara bought 3 notebooks and a water bottle for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹100 (c) ₹97 (d) ₹33
2. 2.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 12 (b) 60 (c) 6 (d) not enough info
3. 3.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
4. 4.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
5. 5.🧩 Ananya bought 3 notebooks for ₹105 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹105 (c) not enough info (d) ₹35
6. 6.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
7. 7.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
8. 8.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) not enough info (b) 7 (c) 70 (d) 14
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
11. 11.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, it is certain (d) yes, mangoes match
12. 12.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
13. 13.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Tara is 10 years old. Rohan is 7 years older than Tara. How old is Rohan? (a) not enough info (b) 7 (c) 18 (d) 17
15. 15.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
16. 16.🧩 Aarav bought 2 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹100 (c) ₹50 (d) not enough info
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you
18. 18.🧩 Nisha bought 5 kites for ₹200 in all. Each kite cost the same. What did one kite cost? (a) ₹200 (b) ₹40 (c) ₹45 (d) not enough info
19. 19.🧩 Meera bought 6 pens and a cap for ₹330 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) ₹324 (c) ₹330 (d) not enough info
20. 20.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM
21. 21.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
22. 22.🧩 Tara bought 4 notebooks and a lunch box for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹250 (b) ₹62 (c) ₹246 (d) not enough info
23. 23.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
24. 24.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
25. 25.🧩 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
26. 26.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
27. 27.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 8 (b) 40 (c) not enough info (d) 4
28. 28.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
29. 29.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
30. 30.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 4 PM (d) 7 PM
31. 31.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
32. 32.🧩 Arjun is 6 years old. Ananya is older than Arjun. How old is Ananya? (a) 8 (b) not enough info (c) 7 (d) 11
33. 33.🧩 Meera bought 2 balls and a cap for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹90 (b) not enough info (c) ₹180 (d) ₹178
34. 34.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 12 (b) 16 (c) not enough info (d) 7
35. 35.🧩 Ishaan bought 6 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) ₹10 (c) not enough info (d) ₹60
36. 36.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Ishaan is 9 years old. Rohan is older than Ishaan. How old is Rohan? (a) not enough info (b) 14 (c) 10 (d) 11
38. 38.🧩 Aarav is 7 years old. Diya is 7 years older than Aarav. How old is Diya? (a) 7 (b) 15 (c) 14 (d) not enough info
39. 39.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 8 PM (c) not enough info (d) 9 PM
40. 40.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 16 (b) 80 (c) 8 (d) not enough info

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